diff --git a/crates/ptth_relay/src/scraper_api.rs b/crates/ptth_relay/src/scraper_api.rs
index e06234d..b41ac80 100644
--- a/crates/ptth_relay/src/scraper_api.rs
+++ b/crates/ptth_relay/src/scraper_api.rs
@@ -232,9 +232,41 @@ async fn metrics (
 {
 	let mut s = String::with_capacity (4 * 1_024);
 	
-	s.push_str ("# HELP forty_two Forty-two\n");
-	s.push_str ("# TYPE forty_two counter\n");
-	s.push_str ("forty_two 42\n");
+	let mut push_metric = |name, help, kind, value| {
+		if let Some (help) = help {
+			s.push_str (format! ("# HELP {} {}\n", name, help).as_str ());
+		}
+		s.push_str (format! ("# TYPE {} {}\n", name, kind).as_str ());
+		s.push_str (format! ("{} {}\n", name, value).as_str ());
+	};
+	
+	let request_rendezvous_count = {
+		let g = state.request_rendezvous.lock ().await;
+		g.len ()
+	};
+	
+	let server_status_count;
+	let connected_server_count;
+	
+	let now = Utc::now ();
+	
+	{
+		let g = state.server_status.lock ().await;
+		server_status_count = g.len ();
+		connected_server_count = g.iter ()
+		.filter (|(_, s)| now - s.last_seen < chrono::Duration::seconds (60))
+		.count ();
+	}
+	
+	let response_rendezvous_count = {
+		let g = state.response_rendezvous.read ().await;
+		g.len ()
+	};
+	
+	push_metric ("request_rendezvous_count", None, "gauge", request_rendezvous_count.to_string ());
+	push_metric ("server_status_count", None, "gauge", server_status_count.to_string ());
+	push_metric ("connected_server_count", None, "gauge", connected_server_count.to_string ());
+	push_metric ("response_rendezvous_count", None, "gauge", response_rendezvous_count.to_string ());
 	
 	#[cfg (target_os = "linux")]
 	{
@@ -242,9 +274,7 @@ async fn metrics (
 		.ok ()
 		.and_then (|s| get_rss_from_status (s.as_str ()))
 		{
-			s.push_str ("# HELP relay_vm_rss VmRSS of the relay process, in kB\n");
-			s.push_str ("# TYPE relay_vm_rss gauge\n");
-			s.push_str (format! ("relay_vm_rss {}\n", rss).as_str ());
+			push_metric ("relay_vm_rss", Some ("VmRSS of the relay process, in kB"), "gauge", rss.to_string ());
 		}
 	}